mirror of
https://github.com/glebd/cocoafob.git
synced 2026-05-30 22:47:34 +00:00
Gleb Dolgich
120 lines
4.2 KiB
PHP
120 lines
4.2 KiB
PHP
<?php
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function base32_encode($input) {
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// Get a binary representation of $input
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$binary = unpack('C*', $input);
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$binary = vsprintf(str_repeat('%08b', count($binary)), $binary);
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$binaryLength = strlen($binary);
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$base32_characters = "ABCDEFGHIJKLMNOPQRSTUVWXYZ234567";
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$currentPosition = 0;
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$output = '';
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while($currentPosition < $binaryLength) {
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$bits = substr($binary, $currentPosition, 5);
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if(strlen($bits) < 5)
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$bits = str_pad($bits, 5, "0");
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// Convert the 5 bits into a decimal number
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// and append the matching character to $output
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$output .= $base32_characters[bindec($bits)];
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$currentPosition += 5;
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}
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// Pad the output length to a multiple of 8 with '=' characters
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$desiredOutputLength = strlen($output);
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if($desiredOutputLength % 8 != 0) {
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$desiredOutputLength += (8 - ($desiredOutputLength % 8));
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$output = str_pad($output, $desiredOutputLength, "=");
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}
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return $output;
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}
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function Base32_decode($inStr) {
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$inString = strtolower(rtrim(str_replace("=", "", $inStr)));
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/* declaration */
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$inputCheck = null;
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$deCompBits = null;
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$BASE32_TABLE = array(
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0x61 => '00000',
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0x62 => '00001',
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0x63 => '00010',
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0x64 => '00011',
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0x65 => '00100',
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0x66 => '00101',
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0x67 => '00110',
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0x68 => '00111',
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0x69 => '01000',
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0x6a => '01001',
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0x6b => '01010',
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0x6c => '01011',
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0x6d => '01100',
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0x6e => '01101',
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0x6f => '01110',
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0x70 => '01111',
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0x71 => '10000',
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0x72 => '10001',
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0x73 => '10010',
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0x74 => '10011',
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0x75 => '10100',
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0x76 => '10101',
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0x77 => '10110',
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0x78 => '10111',
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0x79 => '11000',
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0x7a => '11001',
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0x32 => '11010',
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0x33 => '11011',
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0x34 => '11100',
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0x35 => '11101',
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0x36 => '11110',
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0x37 => '11111',
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);
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/* Step 1 */
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$inputCheck = strlen($inString) % 8;
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if(($inputCheck == 1)||($inputCheck == 3)||($inputCheck == 6)) {
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trigger_error('input to Base32Decode was a bad mod length: '.$inputCheck);
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return false;
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//return $this->raiseError('input to Base32Decode was a bad mod length: '.$inputCheck, null,
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// PEAR_ERROR_DIE, null, null, 'Net_RACE_Error', false );
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}
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/* $deCompBits is a string that represents the bits as 0 and 1.*/
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for ($i = 0; $i < strlen($inString); $i++) {
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$inChar = ord(substr($inString,$i,1));
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if(isset($BASE32_TABLE[$inChar])) {
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$deCompBits .= $BASE32_TABLE[$inChar];
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} else {
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trigger_error('input to Base32Decode had a bad character: '.$inChar.":".substr($inString,$i,1));
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return false;
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//return $this->raiseError('input to Base32Decode had a bad character: '.$inChar, null,
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// PEAR_ERROR_DIE, null, null, 'Net_RACE_Error', false );
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}
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}
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/* Step 5 */
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$padding = strlen($deCompBits) % 8;
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$paddingContent = substr($deCompBits, (strlen($deCompBits) - $padding));
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if(substr_count($paddingContent, '1')>0) {
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trigger_error('found non-zero padding in Base32Decode');
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return false;
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//return $this->raiseError('found non-zero padding in Base32Decode', null,
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// PEAR_ERROR_DIE, null, null, 'Net_RACE_Error', false );
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}
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/* Break the decompressed string into octets for returning */
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$deArr = array();
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for($i = 0; $i < (int)(strlen($deCompBits) / 8); $i++) {
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$deArr[$i] = chr(bindec(substr($deCompBits, $i*8, 8)));
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}
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$outString = join('',$deArr);
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return $outString;
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}
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?>
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